Sizes: XXS – 5XL, 7XL; Fabric: 100% Cotton Twill, 150 GSM; Features: NSW Rail compliant X back taping configuration,Segmented reflective tape to improve comfort, movement, and breathability,150 GSM Midweight cotton twill to keep you cool while still being tough enough for any job,Underarm and upper back mesh vent inserts,Bio Motion tape configuration to improve recognition of human shape at distance,2 Chest pockets with button closures and pen partition;